Macy's–The retailer's stock was downgraded to "neutral" from "buy" at Sterne Agee, which points to a fair valuation amid a slowing in same-store sales.

VMware–EMC is exploring a sale of its stake in the software maker, according to the New York Post. EMC has been under pressure from activist investor Elliott Management to sell its 80 percent stake.

RadioShack–The evaporation of the retailer's market cap is likely to continue, after the company reported a loss that was twice as large as expected, with revenue also well below estimates on a 20 percent drop in same-store sales. The stock has lost 95 percent of its value over the past decade, but RadioShack said it is exploring a variety of strategic alternatives including a possible sale.

Twitter–Twitter announced its first debt sale. Twitter will raise as much as $1.5 billion through a sale of convertible notes.

JDS Uniphase–The company is splitting itself into two separate publicly traded companies by spinning off its communications and commercial optical products business to shareholders.

Yum Brands–The parent of KFC, Pizza Hut, and Taco Bell raised its quarterly dividend by 11 percent, increasing the payout by four cents to 41 cents per share.

Orexigen–The drug maker won FDA approval for its Contrave diet pill, just the third obesity treatment to win federal approval in the past decade.

Five Below (FIVE)– The discount retailer earned 15 cents per share for the second quarter, one cent above estimates, with revenue slightly above forecasts as well. However, Five Below also issued a current quarter forecast that's somewhat below Wall Street estimates.

Restoration Hardware–Restoration Hardware beat estimates by three cents with second quarter profit of 67 cents per share, although the home furnishings retailer's revenue fell below consensus. The company cut its revenue guidance for the fiscal year, although it did raise its adjusted per-share earnings estimate.

Vitamin Shoppe —CEO Tony Truesdale will retire next June, with the nutritional products company planning to begin a search for a successor. Truesdale has been CEO since 2011.

Gogo–Gogo is partnering with T-Mobile US to provide in-flight texting and other services, beginning on September 17.

American Airlines Group —received federal approval to eliminate paper manuals carried by flight attendants in favor of tablet computers. The elimination of paper manuals aboard aircraft will save the airline nearly $1 million per year because of the lighter weight.